JPS6359155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character processing device that can input character data and add or delete an underline.

Conventionally, when underlining characters, etc., an underline is added by bringing the cursor to the position of the character, etc. to be underlined on the display and pressing the "underline" key. To delete an underline, move the cursor to the position you want to delete and press the "Delete Underline" key in the same way as above. This has the disadvantage that it is necessary to provide two types of keys on the keyboard.

The present invention eliminates such disadvantages and provides a character processing device having an underline addition/deletion function that is low in cost and easy to operate.

An embodiment according to the present invention will be described below.

FIG. 1 is a block diagram of a character processing device to which an embodiment of the input device according to the present invention is applied. In the figure, the CPU is a microprocessor that performs calculations and
Make logical judgments, etc. AB is an address bus that transfers signals indicating the control target. DB is a data bus that transfers various data and is a bidirectional bus. CB is a control bus that applies control signals to various control targets.

The KB is a keyboard, and includes a key KB1 for inputting characters, functions, and modes, an underline key KB2, a cursor key KB3, and the like.
KBC is a keyboard controller,
It encodes the data input from KB and sends an interrupt signal to control bus CB.
DPC is a CRT controller that controls the CRT device DP, character generator CG, refresh memory M, and refresh memory controller MC3. The CRT device DP is capable of displaying characters, symbols, strokes, etc. Character generator CG
outputs a desired character/symbol pattern by inputting codes such as character code/symbol code and line address of the character/symbol pattern. The character and symbol patterns are formed in a matrix, and by changing the row addresses, the character and symbol patterns are output. The refresh memory R stores the character symbol code displayed on the CRT device DP, and repeatedly outputs the character symbol code under the control of the CRT controller DPC. The refresh memory controller MC3 controls the refresh cycle of the refresh memory R and the writing and reading of data from the microprocessor CPU according to instructions from the CRT controller DPC. The ROM is a control memory that stores control procedures and the like shown in FIG. The processing procedure stored in the control memory ROM is read out by the ROM controller MC1. RAM is a random access memory used for temporary storage of various data. Memory RAM is RAM controller MC
2, writing and reading are performed. MD is a magnetic disk device that stores kanji information in the format described below. The magnetic disk device MD is controlled by a magnetic disk controller MDD.

P is a printer that records information such as kanji information, katakana, hiragana, etc., and is controlled by a printer controller PD.

The operation of the embodiment constructed as described above will now be described in detail.

This character processing device is written by operating the keyboard KB. When the keyboard KB is operated, an interrupt signal generated by the keyboard KB is transmitted to the microprocessor CPU, which calls the control procedure in the control memory ROM via the microprocessor CPU.
Each control is performed according to the control procedure.

Figure 2 is for explaining the operation of this embodiment, and shows a keyboard in a certain area in the memory RAM.
Data input from the KB is written by the microprocessor CPU according to control procedures in the control memory ROM, and various processes are performed by so-called word processor processing.

The input data is stored in the memory RAM in the form shown in FIG. In other words, 20 indicates the structure of one character data, and 2
1 is the most significant bit MSB, and 22 is the least significant bit LSB. In the figure, each bit LSB, B1 to B14, bit LSB, B
1 to B14 are portions in which character codes are stored, and bit MSB indicated by 21 is a bit that stores a signal indicating whether or not the character is underlined.

The above data is generated by transferring the data part currently being input to the refresh memory M of the CRT device DP during various operations.
Displayed on CRT device DP.

If you want to add an underline to the current cursor position on the CRT device DP, press the keyboard
This is done by pressing the key "underline" KB3 on the KB. "Underline" key KB
When 3 is pressed, the microprocessor is activated by the control procedure in the control memory ROM shown in the flowchart in Figure 3.
It is executed by the CPU. That is, when the "underline" key KB3 is pressed, step 23
The address of the data area on the memory RAM corresponding to the current cursor position on the CRT device DP is calculated, and in step 24 it is checked whether the bit MSB of the data at the address calculated above is 1.
If you want to add an underline, enter 1. If not, enter 0. If the result is not 1 (in this case, it is not 1 because it is added to a place where there is no underline), go to step 25.
Then, set the MSB bit of the address to 1 and exit from this routine. After this, naturally, the data changed as described above is displayed on the CRT device DP as described above.

On the other hand, if you want to delete the underline from data that already has an underline added, set the cursor to the data position in the same way as above,
This is done by pressing the "underline" key KB3.

In other words, in Figure 3, the "underline" key KB
When is pressed, the address of the data in the memory RAM corresponding to the cursor position is calculated in step 23, and the bit of the data at the address is calculated in step 24.
Check if the MSB is 1 (because it is 1 in this case), and if it is 1, step 26
Set MSB to 0. As before, the data changed as described above is of course displayed on the CRT device DP as described above.

As explained above, according to the present invention, it is possible to add or delete an underline with one key, thereby saving the number of keys and improving operability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a diagram showing the data structure in the memory RAM shown in FIG. 1. FIG. 3 is a diagram showing the control procedure. MSB...Most significant bit, KB3...Underline key.

Claims (1)

[Scope of Claims] 1. An input means for inputting character data; a storage means for storing the character data input from the input means; a display means for displaying the character data stored in the storage means; and the display. a cursor for instructing one of the character data displayed on the means; an instruction key for instructing adding or deleting an underline to the character data indicated by the cursor; In response, if an underline is not added to the character data pointed to by the cursor, an underline is added;
A character processing device comprising: a control means for deleting an underline if an underline is added.